Where is the problem occuring. Is it on the hose inbetween where you are pulling and the univalve itself, or on the side between the univalve and the brush? I used to have a push fitting inbetween where i pulled the hose and the univalve, and this started to become a regular problem every few weeks/months, so i replaced the hose without a push connector in the end. However, i switched to barb connectors and this almost completely solved the problem, it was much better than standard push fit. Hope that helps in anyway.